首页|Conductive Polyaniline/Cellulose/Graphite Composite Films with High Thermal Stability and Antibacterial Activity
Conductive Polyaniline/Cellulose/Graphite Composite Films with High Thermal Stability and Antibacterial Activity
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国家科技期刊平台
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Functional composite films were successfully prepared from cellulose,graphite (GP),and polyaniline (PANI) using a combination of physical and chemical processes.Cellulose was dissolved in N-methylmorpholine-N-oxide monohydrate (NMMO) and regenerated in water to form the matrix.GP was dispersed in the NMMO solvent prior to the dissolution of the cellulose,and PANI was deposited on the surfaces of the cellulose/GP films by in situ chemical polymerization.The structures of the PANI/cellusose/GP composite films were investigated using X-ray diffraction analysis,Fourier transform infrared spectroscopy,scanning electron microscopy (SEM),and SEM/energy-dispersive X-ray spectroscopy.The mechanical strengths,thermal stabilities,conductivities,and antibacterial activities of the films were studied in detail.The results showed that GP formed a multilayered structure in the cellulose matrix and that the PANI nanoparticles were tightly wrapped on the film surface.The film thickness increased from 40 μm to 100 μm after the addition of GP and PANI.The tensile strength of the composite films was 80～107 MPa,with the elongation at break being 3％～10％.The final residual weight of the composite films was as high as 65％,and the conductivity of the composite films reached 14.36 S/m.The cellulose matrix ensured that the films were flexible and exhibited desirable mechanical properties,while the GP filler significantly improved the thermal stability of the films.The PANI coating acted as a protective layer during burning and provided good electrical conductivity and antibacterial activity against Escherichia coli;both of these characteristics were slightly enhanced by the incorporation of GP.These PANI/cellulose/GP composite films should be suitable for use in electronics,antistatic packing,and numerous other applications.
JingHuan Chen、JinGang Liu、WenTao Zhang、Kun Wang、XueRen Qian、RunCang Sun
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National Engineering Laboratory of Pulping and Papermaking, China National Pulp and Paper Research Institute, Beijing, 100102, China
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin, Heilongjiang Province, 150040, China
authors are grateful for financial support from the International S&T Cooperation Program of ChinaNational Science Foundation of China for the Key ProjectsNational Science Foundation of China for the Key Projects
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